I cut out the long panels. As you can see I usually baste the curved lines (breast, upper back) while the rest remains only pinned.
These curves are always basted and sewn at the side panels.
I cut out and pinned the sleeves too. The sleeve is fitted and has a slit at the wrist. The fastening is at the middle front. All of these are toughtened with fusible web.
I sewed the body's vertical seams and the sleeves' seams.